Stiles frost



(No Model.)

S. FROST.

MICROSCOPE.

No. 407,192. Patented July 16,1889.

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N. PETERS Phnmulhognpher, wmm w". n. c.

UNITED STATES PATENT OFFICE.

STILES FROST, OF NEIVTON, MASSACHUSETTS, ASSIGNOR TO GEORGE FROST, OFSAME PLACE.

MICROSCOPE.

SPECIFICATION forming part of Letters Patent No. 407,192, dated July 16,1889- Application filed November 5, 1888. Serial No. 290,067. (Nomodel.)

To all whom it may concern:

Be it known that I, STILEs FROST, of Newton, in the county of Middlesexand State of Massachusetts, have invented certain new and usefulImprovements in Microscopic Apparatus, of which the following, taken inconnection with the accompanying drawings, is a specification.

The general object of my invention is to supply a more simple, cheap,durable, and eflicient microscopic apparatus than those now in use forthe study of botanical subjects, minerals, the.

Figure 1 is a side view of a microscopic apparatus constructed inaccordance with my invention. Fig. 2 a top view of the smallerlens-frame and lens therein. Fig. 3 is a top View of the largerlens-frame and lens. Fig. 4 is a top view of the slide-clamp removedfrom the standard. Fig. 5 is a top view of the obj cot-supporting disk.

The complete instrument is shown in side elevation in Fig. 1. Itconsists of a base a and its standard 1:, whose upper end is turned 2 5down to form a shoulder at c, which will serve to support thelens-frames (I 6, having arms (7 and 9. These arms and frames revolveabout the common axis 1). The arm (1, which is soldered to the shorttube (1 to be placed upon the standard, is nearer one end of said tube,the object being to permit of the lenses being placed at diiferentdistances from each other by a transposition of the one marked (1. Thus,the focal point being varied, differcut magnifying powers are obtained.In the same figure h is a slide which can be secured at any point on thestandard by means of the thumb-screw i. j, in Fig. 4, is the aperturefor the passage of the standard. Resting upon this slide is the collar gof the disk f, which may be plain or perforated, as shown in Fig. 5.This disk is intended to support or hold the flower, mineral, or othersubstance which it is desired to observe. If a flower, it

(Shown in These holes have their centers coinis inserted in one of theholes Z.

Fig.

cident with the focal axis of the lenses, the disk itself being, asabove stated, adjustable vertically and rotating in a horizontal plane.Thus quickness and accuracy of adjustment of the object to be examinedis secured, and the object can be moved to different parts of the fieldwhile being observed. By filling all the holes in the disk each can beobserved in turn by either rotating the disk under the field of visionor by changing the position of the eye correspondingly with the lenses.Each lens can be used independently of or in conjunction with the other.

Having thus described my invention, what I desire to secure by LettersPatent is e1nbodied in the subjoined claims:

1. In a microscopic apparatus, the combination of a standard, lenses (16, having arms of dilferent lengths, a disk upon said standard, and aslide and thumb-screw, said slide being under and independent of saiddisk, whereby the disk may be rotated without dist-urbing the focus ofthe lenses, substantially as set forth.

2. In a microscopic apparatus, the combi nation of a standard, the lense and its frame and arm, the tube (Z the lens (I and its supporting-armd, secured to said tube nearer to one of its ends than to the other end,and a disk f, ad justably supported upon the standard, substantially asdescribed.

3. In a microscopic apparatus, a lens (I, with arm which rotates aroundand also has a ver tical movement on the standard b, with a thumb-screws on said arm to hold the lens (I at anyplace on the standard I), withthe disk f permanently attached to the standard Z), as shown anddescribed.

In testimony whereof] have signed my name to this specification, in thepresence of two subscribing witnesses, on this 9th day of October, A.I). 1888.

STILES FROST. \Vitnesses:

CHAS. W. LAvEEs, SAMUEL KLINE.

